<template>
  <div class="cartcontrol">
    <transition name="move">
      <div class="cart-decrease"
           v-show="food.count > 0"
           @click.stop.prevent="decreaseCart"
      >
        <span class="inner icon-remove_circle_outline"></span>
      </div>
    </transition>
    <div class="cart-count" v-show="food.count > 0">{{ food.count }}</div>
    <div class="cart-add icon-add_circle" @click.stop.prevent="addCart"></div>
  </div>
</template>

<script type="text/ecmascript-6">
import Vue from 'vue';

export default {
  props: {
    food: {
      type: Object
    }
  },
  created () {

  },

  methods: {
    addCart (event) {
      if (!event._constructed) {
        return;
      }
      if (!this.food.count) {
        // this.food.count = 1;
        Vue.set(this.food, 'count', 1);
      } else {
        this.food.count++;
      }

      // 派发事件 - event.target DOM 对象
      // this.$dispatch('cart.add', event.target);
      this.$emit('add', event.target);
    },
    decreaseCart (event) {
      if (!event._constructed) {
        return;
      }
      if (this.food.count) {
        this.food.count--;
      }
    }
  }
};
</script>

<style scoped lang="stylus" rel="stylesheet/stylus">
  .cartcontrol {
    font-size 0
    .cart-decrease {
      display inline-block
      padding 6px
      transition all 0.4s linear
      opacity 1
      transform translate3d(0, 0, 0)
      .inner {
        display inline-block
        font-size 24px
        line-height 24px
        color rgb(0, 160, 220)
        transition all 0.4s linear
        transform rotate(0)
      }
      &.move-enter, &.move-leave-to {
        opacity 0
        transform translate3d(24px, 0, 0)
        .inner {
          transform rotate(180deg)
        }
      }
    }
    .cart-count {
      display inline-block
      vertical-align top
      width 12px
      padding-top 6px
      line-height 24px
      text-align center
      font-size 10px
      color rgb(147, 153, 159)
    }
    .cart-add {
      display inline-block
      padding 6px
      font-size 24px
      line-height 24px
      color rgb(0, 160, 220)
    }
  }
</style>
